Freeze the approved content
Do not begin final output while facts are still moving. Confirm calendar title and period, month or date grid, weekday labels, events and key dates and notes, legend and source information and record the approved revision. Weekday alignment, month length, leap dates, holidays and organisation-specific events require a separate accuracy check.. Run spelling, design and accessibility reviews, then save the editable .mpub before creating a PDF. A later correction needs a new proof; editing after approval without repeating review breaks the audit trail.